<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
      *{
        margin:0px;
        padding: 0px;
    }  
    table{
         
        border-collapse: collapse;
    }
    td{
       
        width: 100px;
        height: 40px;
    }
    </style>
    
</head>
<table border="1px";>
<body>
<thead>
    <td></td>
    <td></td>
    <td></td>
</thead>
<tr>
  <td></td>
  <td></td>
  <td></td>
</tr>
<tr>
  <td></td>
  <td></td>
  <td></td>
</tr>
<tr>
  <td></td>
  <td></td>
  <td></td>
</tr>

<tfoot><td colspan="3">点击添加表格</td></tfoot>
</table>
</body>
</html>